I have found that anything fishy seems to cause my border collie to have issues with his anal glands. . .fish chews, fish oil . .. I fed him Farmina for quite a while and then switched to Orijen Regional Red. I found his stinky issue to improve on Orijen :). Then I bought another bag of Farmina and he’s back at it. My question is: what is really causing the issue, though? Both foods contain fish, in fact, it looks like the Orijen has more (oil plus fish and fish meal vs Farmina Boar with just fish oil). Could it be something else? What should I be watching for with his foods?